Distribution of brine in grain boundaries during static recrystallization in wet, synthetic halite: insight from broad ion beam sectioning and SEM observation at cryogenic temperature

We report observations from room temperature static recrystallization experiments (annealing times from minutes to year) of cold-pressed, synthetic, coarse-grained, wet sodium chloride, prepared by broad ion beam polishing and SEM observations at cryogenic temperature to observe directly the brine i...

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Bibliographic Details
Published in:Contributions to mineralogy and petrology 2012-01, Vol.163 (1), p.19-31
Main Authors: Desbois, Guillaume, Urai, Janos L., Kukla, Peter A., Wollenberg, Uwe, Pérez-Willard, Fabián, Radí, Zsolt, Riholm, Sandor
Format: Article
Language:English
Subjects:
Brine
Earth and Environmental Science
Earth Sciences
Geology
Grain boundaries
Ions
Mechanical properties
Mineral Resources
Mineralogy
Original Paper
Petrology
Recrystallization
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Summary:We report observations from room temperature static recrystallization experiments (annealing times from minutes to year) of cold-pressed, synthetic, coarse-grained, wet sodium chloride, prepared by broad ion beam polishing and SEM observations at cryogenic temperature to observe directly the brine in grain boundaries. At all stages of annealing, the majority of the brine in the samples is connected in 2D sections along grain boundaries. Another part of the brine is in isolated brine inclusion arrays along grain boundaries and in brine inclusions left behind by migrating brine-filled grain boundaries. Most of these boundaries are mobile because the aggregate is coarsening. We interpret that the boundaries without observable brine films (
ISSN:0010-7999
1432-0967
DOI:10.1007/s00410-011-0656-x